Part of my issue with your pricing strategy is that the way it is set out seems to almost go against the reason for (me) using a third party for user management, what I mean is that I just want users to be users, I don't care if they log in with social or enterprise etc, having to think about my user breakdown in that way is extra hassle and analysis that I really don't want to have to do. The more dials and knobs I have to think about for users the more complicated it gets for me. i.e. 'ok I use this plan if I have this many social users, but this plan if my users are enterprise users or this plan if etc'. And its kinda hard to tell what my user base will be until they turn up :/
Honestly ideally I want a 'dial' (or maybe 2 dials ,apps and users or whatever), whether that's API calls, unique users per month or whatever, I just want to easily know if I get <X> visitors then how much will it cost me.
I had to sit and think when I looked at your pricing page....I was trying to avoid doing that by throwing money at the problem :)
Hope that makes sense,
Paul